87377569 has 16 divisors (see below), whose sum is σ = 94545360. Its totient is φ = 80455680.

The previous prime is 87377513. The next prime is 87377579. The reversal of 87377569 is 96577378.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7507600 + 79869969 = 2740^2 + 8937^2 .

It is a cyclic number.

It is not a de Polignac number, because 87377569 - 2⁹ = 87377057 is a prime.

It is a super-2 number, since 2×87377569² = 15269679128699522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87377579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224427 + ... + 224815.

It is an arithmetic number, because the mean of its divisors is an integer number (5909085).

Almost surely, 2^87377569 is an apocalyptic number.

It is an amenable number.

87377569 is a deficient number, since it is larger than the sum of its proper divisors (7167791).

87377569 is a wasteful number, since it uses less digits than its factorization.

87377569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 2222640, while the sum is 52.

The square root of 87377569 is about 9347.5969639261. The cubic root of 87377569 is about 443.7448433177.

The spelling of 87377569 in words is "eighty-seven million, three hundred seventy-seven thousand, five hundred sixty-nine".